var isnn,isie
if(navigator.appName=='Microsoft Internet Explorer') //check the browser
	isie=true

if(navigator.appName=='Netscape')
	isnn=true

function right(e) //to trap right click button 
{
	if (isnn && (e.which == 3 || e.which == 2 ))
		return false;
	else if (isie && (event.button == 2 || event.button == 3)) 
	{
		alert("Sorry, you do not have permission to right click on this page.\t\nCopyright &copy;2010 www.Medicopedia.org");
		return false;
	}
		return true;
}

function key(k)   
{
	if(isie)
	{
		if(event.keyCode==17 || event.keyCode==18 || event.keyCode==93)
		{
			alert("Sorry, you do not have permission to press this key.\t\nCopyright &copy;2010 www.Medicopedia.org")
			return false;
		 } 
	}

	if(isnn)
	{
		alert("Sorry, you do not have permission to press this key.\t\nCopyright &copy;2010 www.Medicopedia.org")
		return false;
	}   
}

if (document.layers)
	window.captureEvents(Event.KEYPRESS);  
if (document.layers)
	window.captureEvents(Event.MOUSEDOWN);
if (document.layers)
	window.captureEvents(Event.MOUSEUP);
document.onkeydown=key;  
document.onmousedown=right;
document.onmouseup=right;
window.document.layers=right;
var message="";//Disable rightclick

function clickIE()
{
	if (document.all)
	{
		(message);
		return false;
	}
}
 
function clickNS(e)
{
	if (document.layers || (document.getElementById && !document.all))
	{
		if (e.which==2 || e.which==3)
		{
			(message);
			return false;
		}
	}
}

if (document.layers)
{
	document.captureEvents(Event.MOUSEDOWN);
	document.onmousedown=clickNS;
}
else
{
	document.onmouseup=clickNS;
	document.oncontextmenu=clickIE;
}
 
document.oncontextmenu=new Function("return false")